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this is an instrumentation amplifier circuit...here at non inverting terminal of the op amp reference point is connected..what is the use of this point?what happen if i ground this point..help me please..i am attaching this file..
That will be the nominal output voltage for zero differential input. So, if you connect it to 0V then the output will be 0V for zero input. If you were driving a 5V, ADC you may connect it to 2.5V, for example, so the output is centred around 2.5V.
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